description: These samples were originally collected from a fieldwork trip focused on species of the killfiish genus Kryptolebias. Those fish tissue were then processed using a methylation-sensitive genotype-by-sequencing (msGBS) as described in "Berbel-Filho, Waldir M., et al. Against the Odds: Hybrid Zones between Mangrove Killifish Species with Different Mating Systems.Genes 12.10 (2021): 1486". The samples provided here were incoporated in a dataset together with other Kryptolebias species to generate the first phylogeomic-based hypothesis for the genus (Berbel-Filho et al. in prep).